Masturbation is great. I hear it reduces the risk of prostate cancer because every time you ejaculate your prostate is worked out.
I'm 38, have masturbated from age 14 on a daily basis, and don't look a day over 90.
:)
Just kidding! There's no correlation between frequent masturbation and premature aging. Trust me, we'd see a lot of 30 year old geezers out there if there was.